Paper-making



C. E. POPE.

PAPER MAKING. APPLlCATlQfi FILED OCT. 25. 1918.

1,338,094. I Patented p 27,1920.

3 SHEETS-SHEET 1.

1710611 iof'.

c. E. POPE.

PAPER MAKING. APPLLCATION F lLED OCT. 25, 1918.

1,338,094. e te p -27,1920.

3 SHEETS-SHEET 3.

UNITED STATES PATENT. @FFXCE.

CHARLES E. POPE, 0F SPRINGFIELD, MASSACHUSETTS, ASSIGNOR 'IO GREAT NOBTHERN PAPER COMPANY, OF MILLINOCKET,\ 'VLAINE, A CORPORATION OF MAINE.

PAPER-MAKING.

Application filed. October 25, 1918.

To all whom it may concern:

Be it known that I, Crmnnns E. Porn, a citizen of the United States,residing at Springfield, in the county of Hampden and State ofMassachusetts, have invented an Improvement in Paper-Making, of whichthe following is a specification.

This invention is an improvement in paper machines and consists inimproved mecha nism for removing the moving web of paper from one pressroll felt to another and thence to the driers. This arrangement isapplicable in its entirety only to machines in which the paper sheet isreversed in passing from one press roll felt to another; that isto say,to machines which present one face of the paper sheet to the felt duringthe passage of the sheet through say a second pair of press rolls andthe other side in passing through the third pair of press rolls. Suchmachines are common, owing to the theory that to get a uniform surfaceof the paper such reversal is desirable. My invention can be applied tomany, if not all, such existing machines, at slight expense, andobviously to new machines operating on the above-described principle"Briefly my invention consists in apparatus and means to direct airblasts upon the paper web to direct and support it in its passagebetween the press and guide rolls and to the driers.

Figure 1 is a diagrammaticside elevation of a paper making machine inwhich my invention is embodied.

Fig. 2 is a partial plan view of Fig. 3 is a perspective view of a papermaking machine embodying my invention.

Fig. 4: is a diagrammatic view of means for passing the web from themain press roll felt to the guide rolls.

Fig. 5 is a diagrammatic view of means for passing the web from the toppress roll to the top roller.

Fig. 6 is a diagrammatic view of means for passing the web from theroller of the press rolls to the driers.

As here shown, the press roll felt 10 of the paper making machine isrepresented as passing from an intermediate set of press rolls 11 and 11aroundtheguide roll 12 and carrying upon it the paper web 13. Above thisportion of the press roll felt is a second press roll felt 14. runningaround Specification of Letters Patent.

Patented Apr. 27, 1920.

Serial No. 259,618.

guide rolls 15,'and between the end pair of press rolls 16 and 16.

It is the present practice to transfer the moving paper web 13 from thepress roll felt 1G to the press roll felt 1 1 by passing it by hand overthe guide rolls 17 and thence to the moving feltle'c at a point justbefore said felt 1 1 passes between the press rolls 16 and 16. In thisway it will'be observed that the paper is reversed with relation to thepress roll felts, the surface of the paper sheet in contact with thepress roll felt 10 being uppermost, while the surface not in contactwith the press roll felt 10 is under neath and in contact with the pressroll felt 1 1. The moving web of paper then passes in contact with theupper press roll 16 and according to the present practice is removedfrom the same by hand and run over a roller 18, and thence is carried byhand to the so-called baby drier 19, and thence to the first largedrying roll 20. Different machines are arranged with variousdifferences, but the principle hereinbefore stated a plies to nearly allsuch machines.

This invention relates to mechanism and means for transferring orcarrying the paper through the end press rolls and over to the driers onsuch machines without human handling.

For directing the paper web from the press roll felt 10 from the roll 12upward to the guide rolls 17, I arrange an air pipe 21 perforated toadmit an air blast to pass from it at a point where the air blast can bedirected against the moving paper web 18, or preferably a lead strip 13thereof of any convenient width, say ten inches, carried by the felt 10.The lead strip may be formed from the web by any suitable means and inFig. 1 a paper slitter or knife 13* is provided to slit the web betweenthe second press rolls 11 and 11 and the third or end press rolls 16 and16 to form the lead strip although it is obvious that the lead strip maybe formed at any convenient point, and in point of fact I prefer to formthe lead strip 011 the paper making wire by a squirt in the usual wayand carry the lead strip all the way from the couch rolls to the driersbefore passing the full sheet along. In case the knife 13 is used, it isrotatable, so that it may be out of engagement with. the paper webexcept when the lead strip is being formed and is movable horizontallyacross the machine, so that the lead strip may be extended in widthuntil the entire width of the web is merged in the lead strip, accordingto the usual practice, when the lead strip is running as desired. Incase the entire width of the paper sheet has been passed through theearlier press rolls, then the main body 13" of the paper sheet will passthrough the floor or otherwise to waste, while the lead strip 13 isbeing handled, but as before stated, I prefer to form the lead strip 13at the paper making wire, in which case the knife 18 is unnecessary. Inthe drawings, the perforated pipe 21 is shown near the felt 10-below thepoint where it passes around roll 12 for its return traverse but it maybe otherwise placed, provided its blast is so directed as to strike themoving lead strip 18 and direct it upward toward the guide plate ordeflector 22 and between said plate and the guide rolls 17.

Said guice 22 has its lower end spaced from the lower roll 1-7 asufficient distance to allow plenty of space for the passage of themoving sheet 13' upward between the lower roll 17 and the lower portionof the guide.

said upper roll to direct the paper sheet to v the felt 14. The guide ispreferably formed of galvanized iron plate although it is obvious thatany suitable material or construction may be employed and is preferablywider than the lead. strip 13", say about eighteen inches wide, and itsupper end is preferably closer to the upper guide roll 17 than is itslower end to the lower guide roll.

Perforated pipes for air blasts 23 and 21 are arranged so that the airblasts will be directed to support the paper sheet and assist it in itsupward movement. The pipe 23 is placed above the lower roll 17 and isdirected approximately tangentially to the upper roll 17, so as to passbetween said roll 17 and the iron plate or guide 22 while the blast fromthe pipe 2 1 is directed along the iron plate to prevent any adherenceof the paper to the guide, and also assist in the upward movement of thepaper, the paper in such upward movement, being supported between thetwo air blasts from the pipes 23 and 24. The moving lead strip 13", withthis assistance, passes upwardly between the upper roll 17 and the guideand turns about the roll 17 and passes to the felt 1 1 and be tween thepress rolls and is carried around the upper press roll 16 in accordancewith the present practice in such machines. In practice I find thatalthough the air blast in the pipe 21 blows the paper directly towardthe guide 22, that the blast from the pipe 2-1: maintains a sheet of airbetween the lead strip and the guide 22, so that the lead strip does nottouch the guide 22 even in making the turn. l/Vith fast moving paper themomentum'of the paper' and'the effect of the blast from the pipe '21 issuch that no air blast whatever is needed from the pipe 23, but I preferto maintain the pipe 23 as a precautionary measure, particularly in thecase of machines not running at high speed. In like manner the blastfrom the pipe 2 1 is not always necessary as a sufficient blast of airfrom the pipe 21 will strike the guide 22 and do the work but inpractice I find it much better to use the blast 24:.

To remove the paper from the upper press roll 16, and carry it to thedriers, I arrange pipes for directing opposed air blasts to raise thepaper from the upper press roll and cause it to pass upward between theroller 18 and another galvanized iron plate forming a guide 25, assistedby the air from the pipe 26.

These opposed air blasts are arranged and operated in substantialaccordance with my co-pending application Serial No. 222,167, filedMarch 14, 1918.

The lead strip passing through the press rolls 16 and 16 adheres to theupper press roll until removed and is carried against a doctor 27 untilthe machine tender is ready to carry the paper over to the driers. Toremove the strip 13 from the upper press roll and to cause it to pass tothe driers, I arrange a compressed air pipe 29 governed by a valve 29.in proximity to the upper press roll 16", preferably near the top ofsaid press roll, to remove the paper from the roll 16. The lead strip,when sticking to the upper press roll, will pass between said pipe 29and. the press roll 16. To this pipe I attach two branches 29 and 29,having nozzles, 30 and 30, directed toward each other and toward thelead strip passing between them and so arranged that when. air

is directed through the pipe 29 it will pass" through both nozzles andbetween the lead strip 13 and the roll and deflect the lead strip fromthe roll in the desired direction. The direction of the nozzles isdetermined by the requirement of passing the stream of air between thelead strip and the press roll in opposed relation, which result can bestbe obtained by directing the stream of air from the nozzles in a lineslightly toward the roll and away from a direct line between the twonozzles. lVhen the lead strip 13" is passing around the press roll 16and between the nozzles, and the air blast has been. turned on, thepaper will rise directly upward between the roller 18 and the gelvanized iron plate or guide 25, as above stated. The guide 25 is madesimilar to the guide 22 heretofore referred to and is properly placed tocatch the paper web 13 ular air blast, it being realized that a as itleaves the upper press roll felt 16 and passes around the roll 18 andbetween it and said guide 25.

The pipe 26 is arranged at the lower part of the guide 25 and hasorifices therein to direct a blast of air upward along said guide tocarry the lead strip upward and around the roll 18. In practice thepaper seldom or never touches the guide 25. Said guide 25 is bent, atits upper end, about the roll 18 and therefore turns the air blast fromthe pipe 26 which in turn directs the lead strip over the roll 18 fromthe upper press roll 16.

As the moving paper sheet passes around the roll 18, I may arrange tohave it removed therefrom by a doctor 31, but ordinarily it has noadherence thereto and will pass, by its own momentum and the air blastsfrom the pipe 26 toward the baby drier 9.

In order to support the lead strip and prevent it from dropping belowthe level of the baby drier 9, I place a perforated pipe 33 adjacent theroll 18 and so as to direct an air blast in the desired direction towardthe driers and tangential to the upper face of the baby drier 19. Thesupporting effect of this air blast is such that although the traversefrom the roll 18 to the baby drier 19 is about 6 feet, the paper goesacross without difficulty. To guide the paper around the baby drier 19and to the drier 20, I arrange a third guide 35, above the baby drier 19and partially around and spaced from the same, and another perforatedair pipe 36 with jets directed in the line of said guide 35.

After the lead strip has been passed to the driers the strip may bebroadened to the full sheet as is common practice.

The spacing of all the parts above referred to depends, of course, uponthe speed of the machine, the weight of the paper and the spacing of theparts to which my invention is applied. The above invention can be madeto fit substantially any arr'angement of press rolls which ispracticable in paper making machines of the general type above describedby anyone skilled in the art. For use on fast running news machines, Ihave found that 11,- pipes, having three 9;" holes, occupying a space ofabout a foot, and operating under a pressure of about 1 pounds, will dothe work required on the pipes 21, 23, 24:, 26, 33, and 36.

I prefer to insert valves in all of the pipes having discharge orifices,such as valves 21, 23 24 26 26 29 33 and 36 which are inserted in thecorresponding pipes 21,23, 24, 26, 29, 33 and 36, whereby the dischargepressure may be regulated to obtain the best results from anypartiestronger air blast, and consequently a greater air pressure, maybe necessary for blasts located at some parts of the machine than forblasts located at other parts of the machine, and furthermore a savingof air may be effected by such pressure adjustment.

There are certain groups of pipes or orifices, the air blasts from whichoperate conjointly upon the paper sheet to direct it in a desireddirection and I prefer to control these groups from a single valve andtherefore I employ a valve 410 to simultaneously control the air blastsfrom the pipes 21, 23, and 24, and valve 15 to simultaneously controlthe blasts from pipes 26, 29, 33 and 36, the separate valves in thepipes being employed for this purpose of regulating the air pressure atthe discharge orifices thereof.

In lieu of the various valves for controlling the air pressure and flowthrough the orifices, the air may be admitted simultaneously to all ofthe pipes and the variation in the separate air blasts may be obtainedby suitably proportioning the pipes and discharge orifices.

I claim:

1. In a high speed paper making machine, the combination with aplurality of web supporting devices separated by a substantial distance,of means for utilizing the momentum of the web of paper to transfer alead strip thereof from one of said devices to the other, comprisingapparatus having means for directing currents of air along the path oftravel which it is desired to have said lead strip take to reduce theair resistance to the movement of and support said strip, and additionalmeans for directing currents of air against said supported strip todeflect it and thereby cause it to follow a curved path of travel.

2. In a paper making machine, the combi' nation with a plurality ofdevices separated by a substantial distance and operative to support aweb of paper, of means for automatically transferring a lead strip ofsaid web from one of said devices to the other comprising apparatus fordirecting a blast of air substantially across the space between saiddevices to support said strip against the influence of gravity and toguide it across said space, and deflecting means for said air blastoperative to cause the current of air to guide and support said strip ina curved path of movement.

3. In a paper making machine, the combination with a plurality of websupporting devices separated by a substantial distance, of means forautomatically transferring a lead strip of the web from one of saiddevices to the other, against the influence of gravity, comprisingapparatus for producing two adjacent substantially parallel air blastsalong the path of travel which is desired to have the lead strip takeand between which said lead strip is passed, whereby said blasts willguide said strip in a definite path from one of said devices to theother.

4. In a paper making machine, the combination with a plurality of websupporting devices separated by a substantial distance, of means forautomatically transferring a lead strip of the web from one of saiddevices to the other, against the influence of gravity, comprisingapparatus for producing two adjacent substantially parallel air blastsbetween which said lead strip is passed, whereby said blasts will guidesaid strip in a definite path from one of said devices to the other, andmeans for producing an additional air blast serving to direct the leadstrip between said adjacent air blasts.

5. In a paper making machine, the combination with a plurality of websupporting devices separated by a substantial distance, of means forautomatically transferring a lead strip of the web from one of saiddevices to the other, against the influence of gravity, comprisingapparatus for producing two adjacent substantially parallel air blastsbetween which said lead strip is passed, whereby said blasts will guidesaid strip in a definite path from one of said devices to the other, anda deflector against which said blasts are directed and which is curvedto deflect the currents of air and thereby guide said strip in a curvedpath.

6. In a paper making machine, the combination with two sets of pressrolls and their respective felts arranged to require an upward travel ofthe web of paper in passing from the first felt to the next, of meansfor automatically transferring .a lead strip of paper from the first tothe second felt, comprising means for directing currents of air againstthe lead strip to guide it upwardly and support it laterally in itsmovement across the space between said felts.

7. In a paper making machine, the combination with two sets of pressrolls and their respective felts arranged to require an upward travel ofthe web of paper in passing from. the first felt to the next, of meansfor automatically transferring a lead strip of paper from the first tothe second felt, comprising air conductors arranged to direct currentsof air against the lead strip to guide it upwardly across the spacebetween said felts, and a deflector arranged to direct the air currentsalong the surface of the second felt to guide said strip into operativeengagement with the latter felt and the second set of press rolls.

8. In a paper making machine, the combination with drying cylinders andtwo pairs of press rolls and their respective felts, said rolls beingarranged to reverse the direction of movement of the paper in passingfrom one to the other of said pairs of rolls, of means for automaticallytransferring a lead strip of paper from the felt of the first pair ofrolls through the second pair in reverse direction, removing the stripfrom the felt of the latter pair and carrying it inreverse direction tothe drying cylinders, comprising a series of air conductors arranged todirect blasts of air against the lead strip to support and guide it intraveling from one of said sets of rolls to the other and from thelatter rolls to saidcylinders, and deflectors acting as guides for theair currents which perform said supportingand guiding functions.

9. In a paper making machine, the combination with drying cylinders, twopairs of press rolls and their respective felts arranged to reverse thedirection of movement of the paper in passing from one to the other ofsaid pairs of rolls, and rolls for guiding the paper as it passes fromone of said felts to the other and from the latter felt to the dryingcylinders, of means for automatically transferring a lead strip of paperfrom the first felt through the second pair of press rolls and from thelatter pair of rolls to the (cylinders, comprising deflectors arrangedbeside portions of the path along which it is desired to have the striptravel while making said transfer, and means for directing currents ofair against said deflectors and said strip to guide the strip along saidpath.

10. In a paper making machine, the combination with means for engagingand advancinga strip of paper and a guide'roll for said strip locatedabove the point at which the strip leaves said advancing means, of meansfor automatically transferring said strip from said advancing means tosaid roll, comprising a deflector extending upwardly beside the path oftravel of the paper and curved partially around said roll, and I airconductors arranged to direct currents of air against said strip ofpaper and against said deflector to guide said strip upwardly from saidtransferring means to said roll and direct it partially around the

